[web2py] autocomplete widget error when inserting record

[apple]

I get this error when trying to insert a record manually from a
sqlform:

SyntaxError: Field _autocomplete_name_aux does not belong to the table

Controller line is:
      form.vars.id = table.insert(**dict(form.vars))

Model definition has a field using the autocomplete widget:

db.define_table('order',
        Field('product', db.product,
         widget = SQLFORM.widgets.autocomplete(request,
db.product.name, id_field=db.product.id)),